Bug 104743 - i915_gem_object_flush_for_display : BUG: unable to handle kernel NULL pointer dereference/BUG: unable to handle kernel paging request
Summary: i915_gem_object_flush_for_display : BUG: unable to handle kernel NULL pointer...
Status: CLOSED DUPLICATE of bug 104436
Alias: None
Product: DRI
Classification: Unclassified
Component: DRM/Intel (show other bugs)
Version: XOrg git
Hardware: Other All
: high normal
Assignee: Intel GFX Bugs mailing list
QA Contact: Intel GFX Bugs mailing list
URL:
Whiteboard:
Keywords:
Depends on:
Blocks:
 
Reported: 2018-01-22 23:15 UTC by dmiller150
Modified: 2018-02-13 16:24 UTC (History)
1 user (show)

See Also:
i915 platform:
i915 features:

Attachments
paging request stack (3.35 KB, text/plain)
2018-01-22 23:15 UTC, dmiller150 		no flags Details
Null pointer stack (3.44 KB, text/plain)
2018-01-22 23:16 UTC, dmiller150 		no flags Details
View All

Description dmiller150 2018-01-22 23:15:43 UTC 
Created attachment 136909 [details]
paging request stack

Running a Lenovo T570 with Intel HD Graphics 520 I get a kernel panic due to a kernel paging request.

This usually happens when Firefox or Chrome and a terminal window (xfce-terminal) is open. I could be compiling or could be doing other command line jobs when the system freezes. The attached log is after I enabled VGA_SWITCHEROO=y. With VGA_SWITCHEROO=n, I get a null pointer. Stack trace will be attached shortly. I believe these are the same issue.

I have used the same Linux build on a T540p with an Intel  4th Gen Core Integrated Graphics with no issues.

This has not happen so far with 4.14.14
Comment 1 dmiller150 2018-01-22 23:16:13 UTC 
Created attachment 136910 [details]
Null pointer stack
Comment 2 dmiller150 2018-01-22 23:18:45 UTC 
The stack dump happens with 4.15-rc7
Comment 3 Chris Wilson 2018-01-22 23:20:29 UTC 

*** This bug has been marked as a duplicate of bug 104436 ***

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